DE2344778A1 - Detecting presence of org liqs - with probe consisting of plastic or elast-omeric material contg electrically conducting particles - Google Patents

Detecting presence of org liqs - with probe consisting of plastic or elast-omeric material contg electrically conducting particles

Info

Publication number
DE2344778A1
DE2344778A1 DE19732344778 DE2344778A DE2344778A1 DE 2344778 A1 DE2344778 A1 DE 2344778A1 DE 19732344778 DE19732344778 DE 19732344778 DE 2344778 A DE2344778 A DE 2344778A DE 2344778 A1 DE2344778 A1 DE 2344778A1
Authority
DE
Germany
Prior art keywords
probe
org
plastic
liqs
elast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19732344778
Other languages
German (de)
Other versions
DE2344778B2 (en
DE2344778C3 (en
Inventor
Benno Perren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority claimed from DE19732344778 external-priority patent/DE2344778C3/en
Priority to DE19732344778 priority Critical patent/DE2344778C3/en
Priority to IT3018273A priority patent/IT995911B/en
Priority to NL7314236A priority patent/NL168940C/en
Priority to GB4863073A priority patent/GB1444994A/en
Priority to SE7314213A priority patent/SE411149B/en
Priority to CH1489573A priority patent/CH583905A5/xx
Priority to AT894973A priority patent/AT341810B/en
Priority to JP11859473A priority patent/JPS4996796A/ja
Priority to FR7337711A priority patent/FR2204304A5/fr
Publication of DE2344778A1 publication Critical patent/DE2344778A1/en
Publication of DE2344778B2 publication Critical patent/DE2344778B2/en
Priority to US05/624,243 priority patent/US4125822A/en
Publication of DE2344778C3 publication Critical patent/DE2344778C3/en
Application granted granted Critical
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
    • G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/002—Inhomogeneous material in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/002—Inhomogeneous material in general
    • H01B3/004—Inhomogeneous material in general with conductive additives or conductive layers

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Probe for detecting the presence of org. liqs. esp. mineral oils and fuels consists of a plastic or elastomeric material which is soluble or swells in the org. liq. and contains solid substances having at their surface an electrical conductivity similar to that of metals, these substances being finely divided and having such a concentration that their particles contact each other. The probe gives immediate detection in the form of alarm signal of the presence of an org. liq. even in very small amts. and can be operated over long distance.

Description

sf-t^ zur Häuptartniellung P 22 51 9;?2.4 2344778sf-t ^ zur Hauptartniellung P 22 51 9;? 2.4 2344778

nd= zur Feststellung organischer Flüssigkeitennd = to determine organic liquids

."ie Erfindung "betrifft eine Sonde 2ur Feststellung organischer FlüssigiceiOen, insbesondere von Mineralölen und Treibstoffen, die aus einem in der organischen Flüssigkeit löslichen oder quellbaren kunststoff- oder kautschukartigen. Material bestehen, in welchem Pssrstoffe, die an ihrer Oberfläche eine im Bereich der Metalle liegende elektrische leitfähigkeit aufweisen, in feiner Verteilung und solcher Konzentration, dass sie sich gegenseitig berühren, enthalten sind, nach Patentanmeldung P 22 5Ί 952."The invention" relates to an organic detection probe 2 Liquids, in particular of mineral oils and fuels, which from one which is soluble or swellable in the organic liquid plastic or rubber-like. Material in which Pssrstoffe, which on their surface one in the range of the metals Have horizontal electrical conductivity, finely distributed and in such a concentration that they are mutually exclusive touch, are included, according to patent application P 22 5Ί 952.

In der Hauptanneldung wurde beschrieben, dass das Sondenmafcerial, bestehend aus einem Quellkörper und einer elektrisch leitenden Beimischung, als dünne Schicht auf einen Träger aufgetragen werden kann. Bei geeigneter Konstruktion und .ßimensionieruns sind diese Sonden durch die Zähigkeit des Materials weitgehend unempfindlich gegen äussere Kräfte, Erschütterungen, Schläge usw., aber auch gegen nicht allzu hohe Temperaturen. Sie weisen gegenüberorganischen Flüssigkeiten eine hohe Ansprechewpfindlichkeit und kurze Ansprechzeit auf.In the main announcement it was described that the probe material, consisting of a swelling body and an electrically conductive admixture, applied as a thin layer on a carrier can. With suitable construction and dimensions these probes are largely insensitive due to the toughness of the material against external forces, vibrations, blows, etc., but also against temperatures that are not too high. They point towards organic Liquids have a high response sensitivity and short response time.

Beim Eintauchen in Wasser sprechen Sonden dieser Ausführung nicht an. Ihre Anwendung zur Feststellung von kleinen Beimengungen organischer Flüssigkeiten im Wasser oder zur Signalisierung von z. B. feinen Öl- oder Benzinschichten, welche dem Wasser überlagert sind, scheitert daran, dass wegen der Benetzung der Sonde mit Wasser die Kohlenwasserstoffe von der Sonde ferngehalten werden. Erst eine dickere Schicht vermag die Sonde zu benetzen und durch Einwirkung auf das Quellaiaterial das Vorhandensein einer organischen Verunreinigung anzuzeigen. - Die Löslichkeit von Benzol z. B. in Wasser beträgt ca. 600 ng/lt. Der Kachweis von gelöstem ·■When immersed in water, probes of this type do not speak at. Their application for the detection of small additions of organic liquids in the water or for signaling z. B. fine oil or gasoline layers, which are superimposed on the water, fails because of the wetting of the probe with Water the hydrocarbons are kept away from the probe. Only a thicker layer can wet the probe and get through it Effect on the source material the presence of an organic Display contamination. - The solubility of benzene e.g. B. in water is approx. 600 ng / lt. The proof of solved · ■

509813/09U509813 / 09U

ORiQJNAL INSPECTEDORiQJNAL INSPECTED

Benzol im Wasser ist mit der For ma lausfuhr ung der Sonde schon allein wegen der Tatsache der geringen Konzentration nicht möglicn.Benzene in the water is the only thing you need to know about the probe's form not possible due to the fact of the low concentration.

Der. Erfindung liegt die Aufgabe zugrunde, durch einfache vittel die vorgeschlagene Sonde auch dann gebrauchsfähig zu erhalten, wenn sie in Wasser eintaucht.Of the. The invention is based on the object of keeping the proposed probe usable by simple means, when submerged in water.

Dia erfindungsgenasse Lösung dieser Aufgabe besteht darin, dass das Material der Sonde mindestens an der Oberfläche einen die Ansammlung der organischen Flüssigkeit begünstigenden Stoff aufweist. The inventive solution to this problem is that the material of the probe at least on the surface forms the accumulation the organic liquid has favoring substance.

Polytetrafluoräthylen, unter den 'Tandelsnamen Teflon bekannt, ist Tvasserabstossend, vermag jedoch selbst feinste Tropfen von Kohlenwasserstoffen an seiner Oberfläche zu binden, überdies xeist Teflon schmutzabstossende Eigenschaften auf und das Anwachsen von organischen Lebewesen auf Teflon wurde bisher nicht beobachtet. Wird nun die Oberfläche des Sondenmaterials ait einer dünnen, porösen Teflonschicht versehen, so bleiben auch feinste Spuren z.B. von Öl, welche dem Wasser überlagert sind, oder öltröpfeben, die sich im Wasser befinden und zufällig mit der Oberfläche der Sonde in Berührung kommen, an deren Oberfläche haften."Das Vorhandensein des v5ls wird signalisiert, sobald sich eine solche Mindestmenge angesammelt hat, dass sie das Sondenmaterial zum Quellen bringt. Durch Messung der elektrischen Widerstandsänderung der Sonda können Rückschlüsse auf die Konzentration der Verunreinigung und deren zeitliche Änderung gezogen werden, tfird poröses Triton aach als Trägermaterial verwendet oder dem Sondenmaterial beig-füg-G, so kann die Ansprechempfindlichkeit noch gesteigert werden.Polytetrafluoroethylene, known under the trade name Teflon, is Water-repellent, but capable of even the finest drops of hydrocarbons To bind to its surface, moreover, Teflon exhibits dirt-repellent properties and the growth of Organic living beings on Teflon have not yet been observed. The surface of the probe material is now ait a thin, porous With a Teflon layer, even the finest traces of oil, for example, which are superimposed on the water or even oil droplets, remain are in the water and accidentally come into contact with the surface of the probe, stick to the surface. "The presence des v5ls is signaled as soon as such a minimum amount has accumulated that it is the probe material for swelling brings. By measuring the change in electrical resistance of the Sonda can draw conclusions about the concentration of the contamination and their changes over time are drawn, tfirds porous Triton also used as a carrier material or the probe material enclosed-füg-G, the responsiveness can be increased even further will.

Selbstverständlich können auch solche Stoffe herangezogen werden, die weniger wirksam als Teflon sind, aber die prinzipiell gleichen Eigenschaften haben, beispielsweise Azetalharz, Nylon oder Polypropylen.Of course, substances that are less effective than Teflon, but which are basically the same, can also be used Have properties such as acetal resin, nylon or polypropylene.

Für den Nachweis von In V/asser gelösten organischen Flüssigkeiten wird das Sondenmaterial zumindest an der Oberfläche nit 3inem Adsorber, welcher spezifisch auf die betreffende Verunreinigung empfindlich ist, versetzt. Es sind verschiedene Stoffe bekannt, beispielsweise Aktivkohlen, aufgeschäumtes vulkanisches GesteinFor the detection of in v / ater dissolved organic liquids is at least the probe material, treated on the surface nit 3inem adsorber, which is sensitive specifically to the relevant contaminant. Various substances are known, for example activated carbon, foamed volcanic rock

509813/0914509813/0914

23U77823U778

und. die meisten synthetischen Schaumstoffe, die solche Verunreinigungen hundertprozentig dem Wasser zu entziehen vermögen. Werden nun für die Sonde z.B. feine Aktivkohlekörner verwendet, so vermögen sie die gelösten organischen Flüssigkeiten dem Wasser zu entziehen und geben dieselben teilweise an das Sondenmaterial weiter. Sobald eine genügende Konzentration vorhanden ist, spricht die Sonde an.and. most synthetic foams contain such impurities able to withdraw one hundred percent from the water. If, for example, fine grains of activated carbon are used for the probe, so they are able to remove the dissolved organic liquids from the water and give some of them to the probe material Further. As soon as there is sufficient concentration, the probe responds.

Je nach dem vorgesehenen Änwendungszweck kann das Sondenmaterial beispielsweise nur mit ■ Aktivkohlebeimengungen versetzt sein oder noch zusätzlich -einen Überzug aus porösem Teflon aufweisen. Wird die= Oberfläche der Aktivkohlekcrner mit einer dünnen ptfetall— scnichu überzogen, so übernimmt die Aktivkohle die Funktion sowohl des Adsorbers als auch der elektrisch leitenden Festkörper ir. ^ondenmaterial.Depending on the intended use, the probe material for example only with ■ activated carbon admixtures or also have a cover made of porous Teflon. Will the = surface of the activated carbon grains with a thin ptfetall- scnichu coated, so the activated carbon takes on the function of both the adsorber as well as the electrically conductive solid ir. ^ ondenmaterial.

Γ5-artige Sonden sprechen auf reines .Vasser nicht an, auch wenn sie eine beliebig lange Zeit im Wasser sind, hingegen sprechen ei- i.~f in genügender Menge vorhandene organische Flüssigkeiten pi-ii-:ri3üh augenblicklich an. Sind diese organischen Flüssigkeiten nu::- als Beimengungen im Wasser vorhanden, dann här.jt die Änderung de.7 elektrischen Widerstandes der Sonde, wie schon oben erwähnt, vie it gehend von der Konzentration der Verunreinigungen sowie von . der Kinvrirkzeit ab.5-like probes do not respond to pure water, even if they have been in the water for any length of time, whereas organic liquids that are present in sufficient quantities respond immediately. Are these organic liquids nu :: - present as impurities in the water, then the change här.jt En.7 electrical resistance of the probe, as mentioned above, it vie extent on the concentration of impurities and by. the Kinvrirkzeit.

Wir-3. die Sonde zum Feststellen von organischen Verunreinigungen ir. toc.-*: r- eingesetzt, so ist das Vorhandensein von V/asser eine un-bv.lösbare Voraussetzung für das Funktionieren der Sonde. Sie kann beispirlsweise so ausgebilder sein, dass auf der einen Seite eines Trägers das quellbare !.feterial aufgetragen isr und die andc-r-ö Seite als Leitfähigkeitsmesseinrichtung ausgebildet ist. ΐΓεοί- eiiion separaten, durch das ü'asser geschlossenen elektrischen Stromkreis kann dann zusätzlich das Vorhandensein von Vasser respektive das Austauchen der Sonce aus dem Wasser festgestellt werden. Es kann aber auch der umgekehrte Fall auftreten. 7/enn die Sonda, welche a.B. ein Tankleck signalisieren muss, von ..'asser to-c-1 überfluten wiri, so kann sie eventuell auslaufendes Lecköl nicliu feststellen. Aus diesem Grunde ist eine Signalisierung, dass .Vasser vorhanden ist, sinnvoll.We-3. the probe for detecting organic contaminants ir. toc .- *: r- inserted, the presence of V / ater is a insoluble prerequisite for the functioning of the probe. she can for example be trained so that on one side of a carrier the swellable! .feterial is applied and the andc-r-ö Side is designed as a conductivity measuring device. ΐΓεοί- eiiion separate electrical, closed by the water Circuit can then additionally the presence of Vasser respectively found the sonce emerging from the water will. However, the reverse can also occur. 7 / hen the Sonda, which a.B. a tank leak must signal from .. 'asser to-c-1 is flooding, so it can possibly leak oil nicliu notice. For this reason, a signaling that .Vasser is present makes sense.

50981 3/09U50981 3 / 09U

BAD ORIGINALBATH ORIGINAL

Claims (3)

Pa-cerfcansprüche:Pa-cerfc claims: 1. Sonde zur Peststellung organischer Flüssigkeiten, insbesondere von Mineralölen und Treibstoffen, die aus einem in der organischen Flüssigkeit löslichen oder quellbaren kunststoff- oder kautschukaroigem Material besteht, in welchem Feststoffe, die an ihrer Oberfläche eine in Bereich der Metalle liegende elektrische Leitfähigkeit aufweisen, in feiner Verteilung und solcher Konzentration, dass sie sich gegenseitig berühren, enthalten sind, dadurch gekennzeichnet, dass das Material der Sonde mindestens an der Oberfläche einen die Ansammlung der organischen Flüssigkeit begünstigenden Stoff aufweist.1. Probe for plaguing organic liquids, in particular of mineral oils and fuels, which are made of a plastic or plastic that is soluble or swellable in the organic liquid rubbery material consists in which solids that are attached to their surface have an electrical conductivity in the range of metals, in fine distribution and such a concentration, that they touch each other, are included, characterized in that the material of the probe at least on the surface there is the accumulation of organic liquid having favoring substance. 2. Sonde nach Anspruch Ί, dadurch gekennzeichnet, dass der die Ansammlung der organischen Flüssigkeit begünstigende Stoff aus Polytetrafluoräthylen (Teflon) besteht.2. Probe according to claim Ί, characterized in that the Accumulation of the organic liquid favoring substance consists of polytetrafluorethylene (Teflon). 3. Sonde nach Anspruch 1, dadurch gekennzeichnet, dass der die Anscr—lung der organischen Flüssigkeit begünstigende Stoff aus Aktivkohle besthet.3. Probe according to claim 1, characterized in that the substance which promotes the formation of the organic liquid is made from Activated carbon exists. -. Sonde nach Anspruch 3» dadurch gekennzeichnet, dass die Körner der Aktivkohle an der Oberfläche mit einer Metallschicht versehen-. Probe according to claim 3 »characterized in that the grains the activated carbon is provided with a metal layer on the surface 5098 13/09U5098 13/09 U BAD ORIGINALBATH ORIGINAL
DE19732344778 1972-10-23 1973-09-05 Probe for the detection of organic liquids Expired DE2344778C3 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE19732344778 DE2344778C3 (en) 1973-09-05 Probe for the detection of organic liquids
IT3018273A IT995911B (en) 1972-10-23 1973-10-16 SOUNDER FOR THE ASSESSMENT OF ORGANIC LIQUIDS
NL7314236A NL168940C (en) 1972-10-23 1973-10-16 PROBE.
GB4863073A GB1444994A (en) 1972-10-23 1973-10-18 Probe for detecting liquids
SE7314213A SE411149B (en) 1972-10-23 1973-10-18 PROBE FOR DETECTION OF ORGANIC SCOUTS
CH1489573A CH583905A5 (en) 1972-10-23 1973-10-18
AT894973A AT341810B (en) 1972-10-23 1973-10-23 PROBE FOR DETERMINING ORGANIC LIQUIDS
JP11859473A JPS4996796A (en) 1972-10-23 1973-10-23
FR7337711A FR2204304A5 (en) 1972-10-23 1973-10-23
US05/624,243 US4125822A (en) 1972-10-23 1975-10-20 Probe for determining organic liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732344778 DE2344778C3 (en) 1973-09-05 Probe for the detection of organic liquids

Publications (3)

Publication Number Publication Date
DE2344778A1 true DE2344778A1 (en) 1975-03-27
DE2344778B2 DE2344778B2 (en) 1975-09-18
DE2344778C3 DE2344778C3 (en) 1976-04-29

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822769A1 (en) * 1977-05-25 1978-12-07 Junkosha Co Ltd LEAK DETECTION DEVICE, IN PARTICULAR FOR LIQUIDS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822769A1 (en) * 1977-05-25 1978-12-07 Junkosha Co Ltd LEAK DETECTION DEVICE, IN PARTICULAR FOR LIQUIDS

Also Published As

Publication number Publication date
DE2344778B2 (en) 1975-09-18

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee